| $150,000–350,000 | MASTER KRAFT, INC. | MATTHEWS, NC | Fifth Third Bank |
| $350,000–1 million | MASTHEAD BREWING COMPANY LLC | Cleveland, OH | Fifth Third Bank |
| $150,000–350,000 | MASTHEAD BREWING COMPANY, LLC | CLEVELAND, OH | Fifth Third Bank |
| $350,000–1 million | MATERIAL SOLUTIONS LABORATORY CORPORATION | Elk Grove Village, IL | Fifth Third Bank |
| $150,000–350,000 | MATHEW KLUJIAN SONS, INC. | CHICAGO, IL | Fifth Third Bank |
| $350,000–1 million | MATHEWS FORD SANDUSKY, INC | SANDUSKY, OH | Fifth Third Bank |
| $150,000–350,000 | MATHIS & SONS SEPTIC LLC | ORLANDO, FL | Fifth Third Bank |
| $350,000–1 million | MATRIX CONSULTING ENGINEERS INC. | Lansing, MI | Fifth Third Bank |
| $150,000–350,000 | MATRIX CONSULTING ENGINEERS, INC. | LANSING, MI | Fifth Third Bank |
| $350,000–1 million | MATT'S COOKIE COMPANY | WHEELING, IL | Fifth Third Bank |
| $350,000–1 million | MATTHEW JORGENSEN | Tekonsha, MI | Fifth Third Bank |
| $150,000–350,000 | MATUSHEK NILLES LLC | CHICAGO, IL | Fifth Third Bank |
| $1–2 million | MAURER'S TEXTILE RENTAL SERVICES INC. | Lansing, MI | Fifth Third Bank |
| $1–2 million | MAURER'S TEXTILE RENTAL SERVICES, INC. | DEWITT, MI | Fifth Third Bank |
| $150,000–350,000 | MAVERICK DIRECT, INC | AKRON, OH | Fifth Third Bank |
| $150,000–350,000 | MAVS G LLC | Independence, MO | Fifth Third Bank |
| $150,000–350,000 | MAVS G LLC | INDEPENDENCE, MO | Fifth Third Bank |
| $350,000–1 million | MAX KATZ BAG COMPANY INC | Indianapolis, IN | Fifth Third Bank |
| $350,000–1 million | MAX KATZ BAG COMPANY INC | INDIANAPOLIS, IN | Fifth Third Bank |
| $150,000–350,000 | MAX'S HOSPITALITY GROUP LLC | Highland Park, IL | Fifth Third Bank |
| $150,000–350,000 | MAX'S HOSPITALITY GROUP LLC | HIGHLAND PARK, IL | Fifth Third Bank |
| $150,000–350,000 | MAXWELL'S CORRAL LLC | Saginaw, MI | Fifth Third Bank |
| $150,000–350,000 | MAYBE ENTERPRISES LLC | North Aurora, IL | Fifth Third Bank |
| $150,000–350,000 | MAYBE ENTERPRISES, LLC | NORTH AURORA, IL | Fifth Third Bank |
| $350,000–1 million | MAYER TOOL & ENGINEERING, INC. | STURGIS, MI | Fifth Third Bank |
| $2–5 million | MAYERS ELECTRIC CO.,INC | CINCINNATI, OH | Fifth Third Bank |
| $150,000–350,000 | MAYNARDS WATER CONDITIONING LLC | CALEDONIA, MI | Fifth Third Bank |
| $350,000–1 million | MAZEL & CO., INC. | CHICAGO, IL | Fifth Third Bank |
| $150,000–350,000 | MBR INC DBA ROCKY'S OF NORTHVILLE | Northville, MI | Fifth Third Bank |
| $350,000–1 million | MBR INC DDA ROCKYS OF NORTHVILLE | Northville, MI | Fifth Third Bank |
| $350,000–1 million | MC COOK COLD STORAGE CORPORATION | MCCOOK, IL | Fifth Third Bank |
| $350,000–1 million | MC PHERSON PLASTICS, INC. | OTSEGO, MI | Fifth Third Bank |
| $150,000–350,000 | MCC HEALTH CARE SERVICES INC | EVERGREEN PARK, IL | Fifth Third Bank |
| $150,000–350,000 | MCC PARTNERS LLC | Muskegon, MI | Fifth Third Bank |
| $150,000–350,000 | MCCANN PARTNERS LLC | CHICAGO, IL | Fifth Third Bank |
| $2–5 million | MCCLUSKEY CHEVROLET, INC. | LOVELAND, OH | Fifth Third Bank |
| $150,000–350,000 | MCCRACKEN & GILLEN LLC | Oak Brook, IL | Fifth Third Bank |
| $150,000–350,000 | MCCURDY MECHANICAL CORP. | Fishers, IN | Fifth Third Bank |
| $150,000–350,000 | MCCURDY MECHANICAL CORP. | FISHERS, IN | Fifth Third Bank |
| $150,000–350,000 | MCDANIEL STEEL ERECTION LLC | Walton, KY | Fifth Third Bank |
| $2–5 million | MCDERMOTT CENTER | CHICAGO, IL | Fifth Third Bank |
| $350,000–1 million | MCDONALD AIR & SHEET METAL INC. | Orlando, FL | Fifth Third Bank |
| $350,000–1 million | MCDONALD AIR & SHEET METAL, INC. | ORLANDO, FL | Fifth Third Bank |
| $350,000–1 million | MCDONOUGH MECHANICAL SERVICES, INC. | WAUKEGAN, IL | Fifth Third Bank |
| $150,000–350,000 | MCEWEN TRUCKING, INC. | CORUNNA, MI | Fifth Third Bank |
| $1–2 million | MCF OPERATING, LLC | ANKENY, IA | Fifth Third Bank |
| $150,000–350,000 | MCGINTY, HITCH, PERSON, YEADON & ANDERSON, P.C. | EAST LANSING, MI | Fifth Third Bank |
| $350,000–1 million | MCGUIRE ENGINEERS INC. | Chicago, IL | Fifth Third Bank |
| $350,000–1 million | MCGUIRE ENGINEERS, INC. | CHICAGO, IL | Fifth Third Bank |
| $150,000–350,000 | MCGUIRE'S EVERGREEN GOLF COURSE, INC. | CADILLAC, MI | Fifth Third Bank |
| $350,000–1 million | MCGUIRES EVERGREEN GOLF COURSE | Cadillac, MI | Fifth Third Bank |
| $5–10 million | MCI, LC | IOWA CITY, IA | Fifth Third Bank |
| $150,000–350,000 | MCJ ENTERPRISES INC | Shelby Township, MI | Fifth Third Bank |
| $150,000–350,000 | MCKAY'S MILL ANIMAL HOSPITAL, LLC | FRANKLIN, TN | Fifth Third Bank |
| $150,000–350,000 | MCKINNEY & NAMEI CO., L.P.A | CINCINNATI, OH | Fifth Third Bank |
| $150,000–350,000 | MCKOOL DUCT INC. | Apopka, FL | Fifth Third Bank |
| $150,000–350,000 | MCLAREN DENTAL ASSOCIATES P.C. | Midland, MI | Fifth Third Bank |
| $150,000–350,000 | MCLAREN DENTAL ASSOCIATES, P.C. | MIDLAND, MI | Fifth Third Bank |
| $150,000–350,000 | MCNABOLA LAW GROUP P.C. | Chicago, IL | Fifth Third Bank |
| $150,000–350,000 | MCNEELY OWNED INCORPORATED | Indianapolis, IN | Fifth Third Bank |
| $150,000–350,000 | MCNEELY OWNED, INCORPORATED | INDIANAPOLIS, IN | Fifth Third Bank |
| $350,000–1 million | MCNEILL CHEVROLET INC | SWANTON, OH | Fifth Third Bank |
| $350,000–1 million | MCNERNEY & ASSOCIATES, LLC | CINCINNATI, OH | Fifth Third Bank |
| $350,000–1 million | MCPENDER INC | Cincinnati, OH | Fifth Third Bank |
| $350,000–1 million | MCPENDER, INC | CINCINNATI, OH | Fifth Third Bank |
| $150,000–350,000 | MCPHERSON OIL COMPANY | HOWELL, MI | Fifth Third Bank |
| $150,000–350,000 | MCPHERSON OIL COMPANY | Howell, MI | Fifth Third Bank |
| $150,000–350,000 | MD TOOLING LLC | Howell, MI | Fifth Third Bank |
| $150,000–350,000 | MD TOOLING, LLC | HOWELL, MI | Fifth Third Bank |
| $150,000–350,000 | MDCENTRIC TECHNOLOGIES INC. | Charlotte, NC | Fifth Third Bank |
| $150,000–350,000 | MDCENTRIC TECHNOLOGIES, INC. | CHARLOTTE, NC | Fifth Third Bank |
| $150,000–350,000 | MDI SERVICES, LLC | ORLANDO, FL | Fifth Third Bank |
| $150,000–350,000 | MDRP RESTAURANTS LLC | Bradenton, FL | Fifth Third Bank |
| $150,000–350,000 | MDRP RESTAURANTS, LLC | BRADENTON, FL | Fifth Third Bank |
| $150,000–350,000 | MEADOWBROOK SERVICES LLC | MOGADORE, OH | Fifth Third Bank |
| $350,000–1 million | MEADOWS HOTEL ASSOCIATES LLC | Pittsburgh, PA | Fifth Third Bank |
| $150,000–350,000 | MEADOWS HOTEL ASSOCIATES, LLC | Pittsburgh, PA | Fifth Third Bank |
| $350,000–1 million | MEASUREMENT TECHNOLOGY GROUP INC | GREENWOOD, SC | Fifth Third Bank |
| $1–2 million | MEATHEAD RESTAURANTS LLC | Chicago, IL | Fifth Third Bank |
| $2–5 million | MEATS BY LINZ, INC. | CALUMET CITY, IL | Fifth Third Bank |
| $2–5 million | MECHANICAL CONSTRUCTION MANAGERS LLC | DAYTON, OH | Fifth Third Bank |
| $150,000–350,000 | MECHANICAL CONSULTANTS, INCORPORATED | OWENSBORO, KY | Fifth Third Bank |
| $2–5 million | MECHANICAL SYSTEMS OF DAYTON, INC | DAYTON, OH | Fifth Third Bank |
| $350,000–1 million | MECKLENBURG COMMUNITY CHURCH | CHARLOTTE, NC | Fifth Third Bank |
| $150,000–350,000 | MECKLENBURG PARTNERSHIP FOR CHILDREN | CHARLOTTE, NC | Fifth Third Bank |
| $150,000–350,000 | MECKLENBURG VALVE SOURCE, LLC | CHARLOTTE, NC | Fifth Third Bank |
| $2–5 million | MECUM AUCTION INC | WALWORTH, WI | Fifth Third Bank |
| $2–5 million | MECUM AUCTION INC | Walworth, WI | Fifth Third Bank |
| $350,000–1 million | MED EX DIRECT, LLC | WARREN, MI | Fifth Third Bank |
| $1–2 million | MED1CARE HOME HEALTH, LLC | FINDLAY, OH | Fifth Third Bank |
| $350,000–1 million | MED1CARE OF TOLEDO LTD | HOLLAND, OH | Fifth Third Bank |
| $1–2 million | MEDEFIL INC | Glendale Heights, IL | Fifth Third Bank |
| $1–2 million | MEDEFIL INC | GLENDALE HEIGHTS, IL | Fifth Third Bank |
| $150,000–350,000 | MEDIA TECH LLC | Saint Charles, IL | Fifth Third Bank |
| $2–5 million | MEDICAL CENTER EMERGENCY SERVICES | DETROIT, MI | Fifth Third Bank |
| $2–5 million | MEDICAL CENTER EMERGENCY SERVICES | Detroit, MI | Fifth Third Bank |
| $350,000–1 million | MEDICAL EMERGENCY TREATMENT CORPORATION | MAUMEE, OH | Fifth Third Bank |
| $350,000–1 million | MEDICAL RECOVERY SYSTEMS INC | Cincinnati, OH | Fifth Third Bank |
| $350,000–1 million | MEDICAL RECOVERY SYSTEMS, INC | CINCINNATI, OH | Fifth Third Bank |
| $150,000–350,000 | MEDICAL VENDOR CONSULTING, INC. | WATERFORD, MI | Fifth Third Bank |